Department of Biomedical Engineering, Stony Brook University, State University of New York, Stony Brook, New York 11794, USA.
School of Electrical, Electronic Engineering, IoE2Lab, The SFI-Strategic Research Cluster in Solar Energy Conversion, College of Engineering and Architecture, University College Dublin, Belfield, Dublin 4, Ireland.
Sci Rep. 2017 Jan 6;7:40113. doi: 10.1038/srep40113.
We report a light-field based method that allows the optical encryption of three-dimensional (3D) volumetric information at the microscopic scale in a single 2D light-field image. The system consists of a microlens array and an array of random phase/amplitude masks. The method utilizes a wave optics model to account for the dominant diffraction effect at this new scale, and the system point-spread function (PSF) serves as the key for encryption and decryption. We successfully developed and demonstrated a deconvolution algorithm to retrieve both spatially multiplexed discrete data and continuous volumetric data from 2D light-field images. Showing that the method is practical for data transmission and storage, we obtained a faithful reconstruction of the 3D volumetric information from a digital copy of the encrypted light-field image. The method represents a new level of optical encryption, paving the way for broad industrial and biomedical applications in processing and securing 3D data at the microscopic scale.
我们报告了一种基于光场的方法，该方法允许在单个 2D 光场图像中以微观尺度对三维（3D）体积信息进行光学加密。该系统由微透镜阵列和随机相位/幅度掩模阵列组成。该方法利用波动光学模型来解释在这个新尺度上的主要衍射效应，并且系统点扩散函数（PSF）用作加密和解密的密钥。我们成功开发并演示了一种去卷积算法，用于从 2D 光场图像中检索空间复用的离散数据和连续体积数据。表明该方法适用于数据传输和存储，我们从加密光场图像的数字副本中获得了对 3D 体积信息的真实重建。该方法代表了一种新的光学加密水平，为在微观尺度上处理和保护 3D 数据的广泛工业和生物医学应用铺平了道路。
